Corvus,
I purchased a used ML-10 last year for my son. The bow had been spray painted camo, but cleaned up really nice. Looks great. Anyway, like you, I wanted to get some info on it. I checked out the Martin website last year and found the following info on the bow.....
ML-10 Pioneer(trade mark) Longbow. Draw weights: 30-70, Brace Height: 6 7/8"-7 3/8", AMO Bow Lenght: 68", Mass Weight: 1 lbs. 4 oz. Description: Redisigned laminations and a slight deflex in the limbs have increased the performance and greatly reduced hand shock in this purely traditional longbow. The Pioneer's handle is crafted from Bubinga with Maple and black glass limb laminates. The Pioneer also boasts a laced leather grip. Available in RH or LH. The Martin website had this info listed for a ML-10 produced in 1997. Note: the ML-10 works better at a higher brace height.
Jerry